• Global Simulations of ice Nucleation and Ice Supersaturation with an Improved Cloud Scheme in the Community Atmosphere Model 

        Author(s):Gettelman, A.; Liu, Xiaohong; Ghan, S. J.; Morrison, H.; Park, S.; Conley, A. J.; Klein, S. A.; Boyle, J.; Mitchell, D. L.; Li, J.-L.F.
        Date:2010-01-01
        A process-based treatment of ice supersaturation and ice nucleation is implemented in the National Center for Atmospheric Research Community Atmosphere Model (CAM). The new scheme is designed to allow (1) supersaturation ...
      • Observation of Playa Salts as Nuclei in Orographic Wave Clouds 

        Author(s):Pratt, K. A.; Twohy, C. H.; Murphy, Shane; Moffet, R. C.; Heymsfield, A. J.; Gaston, C. J.; Demott, P. J.; Field, P. R.; Henn, T. R.; Rogers, D. C.; Gilles, M. K.; Seinfeld, J. H.; Prather, K. A.
        Date:2010-08-03
        During the Ice in Clouds Experiment-Layer Clouds (ICE-L), dry lakebed, or playa, salts from the Great Basin region of the United States were observed as cloud nuclei in orographic wave clouds over Wyoming. Using a counterflow ...
      • Climate Impacts of Ice Nucleation 

        Author(s):Gettelman, A.; Liu, Xiaohong; Barahona, D.; Lohmann, U.; Chen, C.
        Date:2012-01-01
        Several different ice nucleation parameterizations in two different General Circulation Models (GCMs) are used to understand the effects of ice nucleation on the mean climate state, and the Aerosol Indirect Effects (AIE) ...
      • Relationship between Reflectivity and Snow Rate for a High-Altitudes-Band Radar, A 

        Author(s):Wolfe, Jonathan P.; Snider, Jefferson Robert
        Date:2012-06-01
        An important application of radar reflectivity measurements is their interpretation as precipitation intensity. Empirical relationships exist for converting microwave backscatter retrieved from precipitation particles ...
      • Intercomparison of the Cloud Water Phase Among Global Climate Models 

        Author(s):Komurcu, M.; Storelvmo, T.; Tan, I.; Lohmann, U.; Yun, Y.; Penner, J. E.; Wang, Y.; Liu, Xiaohong; Takemura, T.
        Date:2014-03-27
        Mixed-phase clouds (clouds that consist of both cloud droplets and ice crystals) are frequently present in the Earth's atmosphere and influence the Earth's energy budget through their radiative properties, which are highly ...